I think tech 1 to 4 when i read mark 1 to 4
Besides, tech 3 worlds makes much more sense than MARK III worlds
Basically, people didn't yet call it tech, but i think we should call Mark III Worlds tech 3 worlds ;p
You know, just so you can maintain the self-image of not having any lapses! ;p
(This post is not supposed to make sense)